CVE-2026-62365
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
In Wazuh, DecodeWinevt in src/analysisd/decoders/winevtchannel.c accumulates unnamed Windows EventChannel Data element contents into the fixed 65,535-byte join_data heap buffer but passes the growing content length rather than the OS_MAXSTR buffer capacity as the snprintf size. An enrolled agent can submit an EventChannel message containing four maximum-sized unnamed Data elements, causing the fourth accumulation to write beyond join_data and corrupt adjacent heap metadata. The subsequent free of join_data2 terminates the wazuh-analysisd process, stopping log ingestion for all agents handled by that manager.
Risk Assessment
May cause a denial of service (DoS) on the Wazuh manager, halting log ingestion for all agents. Loss of security visibility may mask other incidents.
Recommendation
Update Wazuh to version 4.14.7, which contains the fix. Until updated, monitor wazuh-analysisd process stability and limit trust in agents.
Other vulnerabilities in Wazuh
See all- CVE-2026-74043Critical
Wazuh from 4.1.1 before 4.14.8 contains a path traversal vulnerability in upload_list_file, upload_rule_file, and upload_decoder_file that allows malicious cluster workers to write files at arbitrary paths. Attackers holding the cluster key can send DistributedAPI requests with ../ sequences in filename, bypassing REST controller validation, to write files as the wazuh user.
- CVE-2026-74040Critical
Wazuh versions from 3.9.0 before 4.14.8 contain an arbitrary file overwrite vulnerability in MasterHandler.process_files_from_worker allowing a cluster worker to overwrite protected master files. Attackers controlling a worker can use a trailing-slash basename bypass and missing extra_valid enforcement to overwrite ossec.conf and agent.conf, achieving root remote code execution across the manager and every agent.
- CVE-2026-61800Critical
Wazuh versions 4.4.0 through 4.14.6 contain a vulnerability that allows a party holding the cluster key to write, overwrite, or delete arbitrary files under /var/ossec on worker nodes, potentially leading to remote code execution as root. The issue stems from incomplete path verification during cluster file synchronization. This is fixed in version 4.14.7.
- CVE-2026-49441Critical
In Wazuh from 4.3.0 until 4.14.6 and 5.0.0-beta3, the non-merged branch of process_files_from_worker() in framework/wazuh/core/cluster/master.py trusts a peer-controlled file_path key from files_metadata.json. The destination is joined to WAZUH_PATH without proving that it remains inside the directory selected by cluster_item_key. A cluster peer holding the shared Fernet key can upload a crafted extra-valid archive and overwrite security-sensitive files such as /var/ossec/etc/ossec.conf, leading to code execution after a service reload.
- CVE-2026-48162Critical
In Wazuh from 4.0.0 until 4.14.6 and 5.0.0-beta3, DistributedAPI.send_tmp_file() in framework/wazuh/core/cluster/dapi/dapi.py joins an attacker-controlled tmp_file value to WAZUH_PATH without canonicalization or confinement. A cluster peer holding the shared Fernet key can use traversal or an absolute path to make the master return any readable file over the cluster channel. Reading /var/ossec/api/configuration/security/private_key.pem allows the peer to forge administrator REST API tokens offline and then exercise administrative privileges without creating an account.
- CVE-2026-48024Critical
In Wazuh from 4.0.0 until 4.14.6 and 5.0.0-beta3, cluster.unmerge_info() in framework/wazuh/core/cluster/cluster.py constructs paths from peer-controlled merge_type and name values in a merged synchronization archive. process_files_from_worker() in framework/wazuh/core/cluster/master.py does not adequately confine the resulting path to the declared cluster item directory. A cluster peer holding the shared Fernet key can use traversal in files_metadata.json or a merged-file header to write files such as /var/ossec/etc/ossec.conf, leading to code execution when Wazuh services reload.
- CVE-2026-67308Critical
Wazuh workflows before commit 44bf114 contain a shell injection vulnerability in GitHub Actions that allows attackers to execute arbitrary commands by submitting pull requests with crafted VERSION.json files. Attackers can inject shell metacharacters into environment variables that are directly interpolated into run steps, enabling command execution and exfiltration of secrets including GITHUB_TOKEN and AWS credentials on self-hosted runners.
- CVE-2025-24016CriticalActively exploited
Wazuh is a platform for threat prevention, detection, and response. Starting in version 4.4.0 and prior to 4.9.1, an unsafe deserialization vulnerability allows remote code execution on Wazuh servers. An attacker can inject an unsanitized dictionary in a DAPI request/response to execute arbitrary Python code.
- CVE-2026-112341Medium
Wazuh versions from 4.0.0 before 4.14.9 contain a SQL injection vulnerability in WazuhDBBackend._substitute_params due to sequential regex placeholder cross-contamination. An authenticated user with agent:read on one agent can inject UNION SELECT via the q and search parameters to extract every agent's internal_key through a blind boolean oracle on total_affected_items.
- CVE-2026-112339Medium
Wazuh from 3.9.0 before 4.14.9 contains a missing TLS hostname verification vulnerability in the fluent-forward module's wm_fluent_ssl_ctx() that allows network attackers to impersonate the Fluentd collector by presenting any certificate chaining to the configured ca_file. Attackers who redirect the connection via DNS, ARP, or on-path positions can receive forwarded security telemetry and the shared_key_hexdigest for offline cracking.
Original NVD description (English source)
Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. DecodeWinevt in src/analysisd/decoders/winevtchannel.c accumulates unnamed Windows EventChannel Data element contents into the fixed 65,535-byte join_data heap buffer but passes the growing content length, rather than the OS_MAXSTR buffer capacity, as the snprintf size. An enrolled agent can submit an EventChannel message containing four maximum-sized unnamed Data elements, causing the fourth accumulation to write beyond join_data and corrupt adjacent heap metadata. The subsequent free of join_data2 causes the wazuh-analysisd process to terminate, stopping log ingestion for all agents handled by that manager. This vulnerability is fixed in 4.14.7.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS